The tubing below is from Albion alloys ltd, and has a i/d of 0.8 mm and an o/d of 1.0 mm, and that is a piece of 0.7mm nickel silver rod inside of it.
And a bit of a cruel close up, this is showing what I intend to do at a baseboard joint, the tubing is just slid over the rod to keep the ends together.
Sorry for the hijack Jinty,
Martyn.